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<h1 class="topictitle1">备份前准备</h1>
<div><p>备份前，请参考<a href="#dameng-00008__zh-cn_topic_0000001505943769_table10744125193920">表1</a>提前准备相关信息。</p>
<div class="note"><img src="public_sys-resources/note_3.0-zh-cn.png"><span class="notetitle"> </span><div class="notebody"><ul id="dameng-00008__ul17447111517311"><li id="dameng-00008__li18475121815115"><span id="dameng-00008__ph1292522251311">本节操作如无特殊说明均以Dameng 8版本为例进行，数据库版本不同操作可能存在差异，请以实际为准。</span></li><li id="dameng-00008__li135951626152410"><span id="dameng-00008__ph1879711368271">对于以集群方式部署的Dameng数据库，如无特殊说明，均需登录集群实例所在的所有主机执行以下操作。</span></li></ul>
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<div class="tablenoborder"><a name="dameng-00008__zh-cn_topic_0000001505943769_table10744125193920"></a><a name="zh-cn_topic_0000001505943769_table10744125193920"></a><table cellpadding="4" cellspacing="0" summary="" id="dameng-00008__zh-cn_topic_0000001505943769_table10744125193920" frame="border" border="1" rules="all"><caption><b>表1 </b>备份前准备</caption><colgroup><col style="width:26.97%"><col style="width:60%"><col style="width:13.03%"></colgroup><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="26.970000000000006%" id="mcps1.3.3.2.4.1.1"><p>准备项</p>
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<th align="left" class="cellrowborder" valign="top" width="60.00000000000001%" id="mcps1.3.3.2.4.1.2"><p>获取方式</p>
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<th align="left" class="cellrowborder" valign="top" width="13.030000000000003%" id="mcps1.3.3.2.4.1.3"><p>数据使用章节</p>
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<tbody><tr><td class="cellrowborder" valign="top" width="26.970000000000006%" headers="mcps1.3.3.2.4.1.1 "><ul><li>数据库的安装用户名、密码</li><li>数据库安装目录下的bin目录路径</li><li>dm.ini配置文件所在路径</li></ul>
<p></p>
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<td class="cellrowborder" valign="top" width="60.00000000000001%" headers="mcps1.3.3.2.4.1.2 "><p>数据库的安装用户名可通过以下方式查询，安装用户的密码请联系数据库管理员获取。</p>
<ol><li id="dameng-00008__li159953579577">使用PuTTY登录Dameng数据库所在主机，然后切换至<strong id="dameng-00008__b3153175110268">root</strong>用户。</li><li id="dameng-00008__li1899525755716"><a name="dameng-00008__li1899525755716"></a><a name="li1899525755716"></a>执行以下命令，查询数据库的安装用户名、数据库安装目录下的bin目录路径以及dm.ini配置文件所在路径。<pre class="screen">ps -ef | grep dm.ini</pre>
<p>回显类似如下信息，其中<span class="filepath">“/dm8/data/DMServer/DAMENG/”</span>即为dm.ini配置文件所在路径，dm.ini文件路径所在行的<strong>dmdba</strong>即为数据库安装用户，<span class="filepath">“/dm8/bin”</span>即为数据库安装目录下的bin目录路径。</p>
<pre class="screen">[root@dameng16543 <font style="font-size:8pt" Face="Courier New" >~</font>]# ps -ef | grep dm.ini
root       508  8886  0 09:45 pts/2    00:00:00 grep --color=auto dm.ini
<strong>dmdba</strong>    21665     1  0 Jul16 ?        00:16:37 <strong>/dm8/bin</strong>/dmserver path=/dm8/data/DMServer/DAMENG/dm.ini -noconsole</pre>
</li></ol>
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<td class="cellrowborder" rowspan="3" valign="top" width="13.030000000000003%" headers="mcps1.3.3.2.4.1.3 "><p><a href="dameng-00008.html">备份前准备</a></p>
<p><a href="dameng-00012.html">步骤3：注册Dameng数据库</a></p>
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<tr><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.4.1.1 "><p>数据库侦听的端口号</p>
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<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.4.1.2 "><ol><li>使用PuTTY登录Dameng数据库所在主机，然后切换至<strong id="dameng-00008__dameng-00008_b3153175110268">root</strong>用户。</li><li>执行以下命令，查询端口号。<pre class="screen">cat<strong> </strong><em>dm.ini配置文件所在路径</em>/dm.ini | grep PORT_NUM</pre>
<div class="note"><span class="notetitle"> 说明： </span><div class="notebody"><p>命令中的<em>dm.ini配置文件所在路径</em>请根据前面<a href="#dameng-00008__li1899525755716">2</a>中查询结果替换。</p>
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<div class="p">回显类似如下，其中<span class="menucascade">“<span class="uicontrol">PORT_NUM</span>”</span>对应的值即为数据库侦听的端口。<pre class="screen">                PORT_NUM                        = 5236                  #Port number on which the database server will listen</pre>
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</li></ol>
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<tr><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.4.1.1 "><p>数据库认证方式</p>
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<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.4.1.2 "><ol><li>使用PuTTY登录Dameng数据库所在主机，并执行以下命令，切换至数据库安装用户，以<strong>dmdba</strong>为例。<pre class="screen">su - dmdba</pre>
</li><li>进入数据库安装目录下的bin目录，以<span class="filepath">“/dm8/bin”</span>为例。<pre class="screen">cd <em>/dm8/bin</em></pre>
<div class="note"><span class="notetitle"> 说明： </span><div class="notebody"><p>数据库安装目录下的bin目录路径请根据前面<a href="#dameng-00008__li1899525755716">2</a>查询的结果替换。</p>
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</li><li>执行以下命令，登录Dameng数据库。<pre class="screen">./disql <em>数据库的安装用户名</em>/<em>数据库的安装用户的密码</em>@LOCALHOST:<em>数据库侦听的端口号</em></pre>
<p>示例：</p>
<pre class="screen">./disql SYSDBA/SYSDBA@LOCALHOST:5236</pre>
</li><li>执行以下命令，查看VALUE参数项取值。<pre class="screen">select name, value from v$parameter where name = 'ENABLE_LOCAL_OSAUTH';</pre>
<div class="p"><span><img src="zh-cn_image_0000002164819490.png"></span><ul><li>如果取值为<span class="parmvalue">“1”</span>，则表示为OS认证。</li><li>如果取值为<span class="parmvalue">“0”</span>，则表示非OS认证。</li></ul>
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</li></ol>
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